Fluid-pressure-operated railway dump car



A. c. SCHMOHL ,ET AL 1,711,211

FLUID PRESSURE OPERATED RAILWAY DUMP CAR Filed Nov. 23, 1927 4 Sheets-Sheet 1 April 30, 1929.

1 J i m o m ,1? m .f. M C M m M 4 F9 1 3h To 1 i610 3 Jim "m m m \J .rv f r m w FL m April 30, 1929.

A. c. SCHMOHL ET m.

FLUID PRESSURE OPERATED RAILWAY DUMP CAR Filed Nov. 2:5. 1927 4 Sheets-Sheet 2 QNTAL TRAI- HANDLE 0 DOWN DU MP THIS SIDE T a i 12* L a 1 flfifw T3 W' l 1s WITNESS INVE TOR #4 A. c. S CHMOHL ET AL 1,711,211 FLUID PRESSURE OPERATED RAILWAY DUMP CAR April 30, 1929.

Filed Nov. 23, 1927 4 Sheets-Sheet 3 v Q Q 1 g I E OR I 4 April 1 9- A. c. sci-mom. ET AL FLUID PRESSURE OPERATED RAILWA Y DUMP CAR Filed Nov. 23, 1927 4 Sheets-Sheet 4 WITNESS Patented Apr. so. 1929.

UNITED STATES I 1,711,211 PATENT OFFICE.

ALFRED c. scHMoHL, or BEAVER nannsnnn :ronn P. ANDERSON, or KOPPEL, PENN- SYLVANIA, AssIGNons, BvMEsnn ASSIGNMENTS, 'ro rnnssnn STEEL can com- PANY, or PITTSBURGH, PENNSYLVANIA, A CORPORATION on NEW JERSEY.

FLUIn-PREssnnn-oPERATnn RAILWAY DUMP: CAR.

Application filed November 23, 1927. Serial na eaazoo.

An object of the invention is to provide a flu d pressure operated dump car with a valve for selectively supplying pressure to operate the body tilting cylinders and an indicating device in conjunction with the valve operating mechanism to indicate to the operator the side towards which the car will dump.

Another object of the invention is to provide a valve to control the selectively supplying of, pressure to the desired body tilting cylinder that will also exhaust pressure from the inactive cylinder and allow its piston to descend freelyand prev nt injury to of cars is being dumped as a unit,-and to provide means for securing such indicating mechanism in place against accidental displacementj. I

The subject matter of this invention is to be used with a dump car having pressure operated body tilting cylinders, a pressure reservoir and a pressure supply line similar to that shown in our application filed January 6, 1928, Serial No. 244,877.

Referring to the drawings, Fig. 1.is a plan view of the valve operating and indicating mechanism; Fig. 2 is aview taken along the lines 2-2 of Fig. 1 showing the connection between the indicating mechanism and valve operating mechanism; Fig. 3 is a view along the lines 3-3 of Fig. 1; Fig. 4 is a side view of the valve operating mechanism and its application to the valve; Fig. 5 is an enlarged view of the indicating plate and shows'the marking thereon; Figs. 6, 7 and 8 are sections taken through the valve showing "the positions of the valve plug when the cylinders are being actuated and also when the valve is closed; Fig. 9 1s a section through the valve takenalong the lines 9-9 ofsFi'g. 6; Figs. 10 and 11 are end viewsof the Fig. 9 showing the exterior of the valve casin Fig. 12 is a' view showing the valve plug and the ports therein; Fig. 13 is a sect-ion taken along the lines 1313 of Fig. 12 and shows the safety channel and main pressure communicating portjoi' the valve plug;.Fig. 14 man end view of the valve plug.

Referring now in detail to the drawings, reference character 1 indicates the valve casing with a rotatable plug 2 contained .tlierein, outlets 3 of the casing communicate with the respectivebody actuating cylinders of.

the car and a pressure supply inlet 4:. Extending transversely of the rotatable plug portion is an opening 5 adapted to selectively connect either of the cylinder outlets 3 to the pressure supply inlet 4. On the periphery of the plug portion is a channel 6 adapted to connect the inactive outlet of the valve to an exhaust port 7 of the casing which communicates to the atmosphere; A. well 8 formed in therotatable plug portion 2 is valve plug. Fitted to this extension 11 is a handle 12 which is connected to the valve operating mechanism arm 13 by a handle 12 The valve operating mechanism comprises a transverse arm 14 extending beyond both sides of the car frame and connected'at its center portionto the valve arm 13. On both sides of the car are indicating plates 15 through which the transverse arm 14: extends and which have marked thereon the posi tions assumed by the handle 16 when the car is dumping to one side or to the other and when thelvalve is set in a neutral position.

Near one end of the transverse arm 14. is

provided means to prevent accidental dis- I ings in the indicating pl:

21 which are forced into engagement with spaced openings in the leg 11 ot the support. Secured to the arm 14, intermediate the handle 16 and indicating plate 15 is a member which revolves with the operating arm 16 and has an opening 22 term-ed therein which registers with similar openings in the plate 15 as the operating arni assumes the various operative positions. Before turnrig the handle 16, suilicient effo must be applied to further conipress the stil spring 19 and tree the lugs 21 of the member 18 from he openings in the iineinber 17. T h us the handle 16 is held by this means against dirglacenieut during operation of the car and a padlock can be inserted through the coinciding opene and opening in the member 20 to p en t any turning of the handle while the car is in transit to its d uinpin g destin ati on.

Assuming the car to be positioned on the railway tracks and ready to discharge its contents towards the side at which the operator is standing, the operator would turn the handle 16 to the position shown 16 in the Fig. 4: of the drawings and which reads on the marker plate Dump this side. The handle 16 in turn, actuates the arms l l; and 13 to the valve in the position as shown in Fig; 6 of t is drawings. The pressure when admitted to the valve through the pressure inlet 4 passes through the tra A .1 5 in the valve plug and outthrough the cyl' der outlet 3. Any pressure that may be in the inactive cylinder or the piping between such cylinder and the valve 1 would be permitted to escape through the cylinder outlet 3 into the channel 6 and out through the eX haust outlet 7 of the valve 'zsing to the atmosphere, and thus permit the piston of the inactive cylinder to descend without damage to itsel'l or the cylinder.

The type of dump car with which this valve is used is preferably of the trunnion bearing type and has the trunnions near the sides of the car so that the body when tilted has a n'cponderence ol its weight towaros the center of the undcrtraine, thus when it is desired to right the body of the car, the flow of pressure to the body actuating cylinders which are holding the body in tilted position is cut oil and the body returns to a horizontal position by reason of its own weight and the force of gravity. The descending body depresses the previously actuated piston of the cylinder and forces the remaining fluid pressure out through the valve to a suitable exhaust outlet, in the pressure supply line to the valve, and into the atmosphere.

Should the operator desire to tilt the car body to the opposite Slde 'on'i that at which he is standin he would turn the handle to the position marked 16* of Fig. The valve plug would then assume the position as shown in Fig. 7 ofthe drawings and the pressure when turned into the car would actuate the proper body tiltiu C} l' LS. hitter the car has discharged its con the operator cuts off the pre I Suppl die valve and the body resumes a horizontal {)USll'iOllilFl described above.

/Vhen it is desired to render any particular car inactive while a tin, i of such cars is dumping, the handle oi the operating mechanism is to ad to H i nun-lied Horisontal-neucyl on This causes the valve position shown in l here the opening 5 0. ing; to the o" o of the drawings; i e ilug communicatiessure inlet t is closed and the safety channe Qiicates to both cylinder outlet; 3 an mediate said cylinders and pressure line, so

MAL valve comprising an outer casing'and an in.- ner plug port-ion rotatable on its longitudinal axis interiorly of said casing, outlets in said casing to said cylinders and a pressure line inlet, a transverse opening through said rotatable plug portion connecting the pressure line to either outlet to the cylinders, an exhaust port in said casing and a channel in the periphery of said plug connecting said exhaust port and a cylinder outlet when the other of said cylinder outlets is connected through said plug to the pressure line.

2. In a pressure operated two-way dump car having body tilting cylinders and'a pressure line, a bocy control valve intermediate said cylinders and pressure line, said valve comprising an outer casing and an inner plug portion rotatable on its longitudinal axis interiorly of said casing, outlets in said casing to said cylinders and a pressure line inlet, a transverse opening through said rotatable plug connecting the pressure line to either cylinder outlet, an exhaust port in said casing and a channel in the periphery of said plug, said channel exhausting pressure from both operating cylinders when said pressure line inlet is closed.

3. In a pressure operated dump car having body tilting cylinders and a pressure line, a body tilting control valve intermediate said cylinders and pressure operatin line,. so lectively connecting and disconnecting either or both of said cylinders and operatingline,

an exhaust port in said valve casing and a channel in the periphery of the plug of said valve selectively connecting the inactive cylinder to the atmosphere,

i. In a pressure operated dump car having body tilting cylinders and a pressure line,

a body tilting control valve intermediate said cylinders and pressure line, selectively admitting pressure to either of said cylinders, means operating said valve and extending through an indicator plate on the exterior of said car, said extension of means cooperating with said plate to indicate the side to which said car is dumping.

5. In a pressure operated dump car, valve means for selectively controlling the tilting of said car, means extending transversely of the car for operating said valve control, an indicator plate on the exterior of said car cooperating with said valve operating means to show the direction of tilting of said body, and openings in said plate toreceive means for locking said valve operating means in position.

6. In a two-Way pressure operated dump car, means comprising pressure operated body tilting cylinders,v a pressure line and an operating valve-intermediate said cylinv ders and pressure line for selectively controlling the tilting of said car, a mechanism for operating said valve, said mechanism extending from said valve to the exterior of said car cooperating with a suitable marked plate to indicate the direction of. tilting of said body. i

7. In a pressure operated dump car having body tilting cylinders and a pressure line, a control valve intermediate said pressure line and body tilting cylinders, a transverse shaft beneath the body for operating said valve, handles on said shaft cooperating'with markings on the sides of the car for indicating the direction of tilting, automatic means at the side of said car for maintaining said handles in operating position. v

8. In a pressure operated dump car having body tilting cylinders and a pressure line, a control valve intermediate said pressure line and body tilting cylinders, a transverse shaft beneath the body for operating said valve, handles on said shaft cooperating with markings on the sides of the body for indicating the direction of tilt of said body, means at the side of said car for preventing accidental movement of said shaft, said means comprising a member for supporting said shaft, a member on said shaft engaging said supporting member and a compression member holding said last mentioned member in engagement with said supporting member.

In testimony whereof, we afiix our signatures.

- ALFRED C. SCHMOHL.

JOHN P. ANDERSON. 

